12
2 multiplied by 6 is 12 and so 1 multiplied by something is 12
Hope this helps.
A) z value = (x - π) / <span>σ = 100 - 133 / 23 = -1.43
p(<= 100) = 0.0764
</span>
The area of a triangle is base length x height then divide all by 2,
so 12 x 10 /2
=60 ft²